Hi, i have a very irriting problem that i have written a short piece of code
to demonstrate. The problem is that my aspx page is not fully refreshed
after an event, which is delegated to an ImageButton during runtime, is
fired. Any suggestions would be great. This code is the c# behind a webform
with 1 panel and 2 buttons on it. I can see that the Page controls are
correct after the event, but the page does not display it this way.
protected System.Web.UI.W ebControls.Butt on Button1;
protected System.Web.UI.W ebControls.Butt on Button2;
protected System.Web.UI.W ebControls.Pane l Panel1;
private void Page_Load(objec t sender, System.EventArg s e)
{
if (Session["table"] != null)
Panel1.Controls .Add((Table) Session["table"]);
else
DisplayTable(tr ue,true);
}
private void DisplayTable(bo ol cell1, bool cell2)
{
Table table = new Table();
Panel1.Controls .Clear();
if (cell1)
{
table.Rows.Add( CreateCell(1));
}
if (cell2)
{
table.Rows.Add( CreateCell(2));
}
Panel1.Controls .Add(table);
Session["table"] = table;
}
private TableRow CreateCell(int cellId)
{
TableRow row = new TableRow();
TableCell cell = new TableCell();
ImageButton button = new ImageButton();
button.Alternat eText = "Button"+cellId ;
button.ID = "BTN"+cellI d;
button.CommandN ame = cellId.ToString ();
EventInfo eventInfo = button.GetType( ).GetEvent("Cli ck");
Delegate d = Delegate.Create Delegate(typeof (ImageClickEven tHandler),
this, "NewPostbackEve nt");
eventInfo.AddEv entHandler(butt on, d);
cell.Controls.A dd(button);
row.Cells.Add(c ell);
return row;
}
private void NewPostbackEven t(object sender,
System.Web.UI.I mageClickEventA rgs e)
{
ImageButton button = (ImageButton) sender;
if (button.Command Name == "1")
DisplayTable(fa lse, true);
else
DisplayTable(tr ue, false);
}
private void Button1_Click(o bject sender, System.EventArg s e)
{
DisplayTable(tr ue,true);
}
private void Button2_Click(o bject sender, System.EventArg s e)
{
// Page.FindContro l("BTN1");
// Page.FindContro l("BTN2");
}
3  2477 
"George K" <a@bluefiretech nologies.com> wrote in message
news:ru******** ***********@war ds.force9.net.. . Hi, i have a very irriting problem that i have written a short piece of
code to demonstrate. The problem is that my aspx page is not fully refreshed
after an event, which is delegated to an ImageButton during runtime, is
fired. Any suggestions would be great. This code is the c# behind a
webform with 1 panel and 2 buttons on it. I can see that the Page controls are
correct after the event, but the page does not display it this way.
protected System.Web.UI.W ebControls.Butt on Button1;
protected System.Web.UI.W ebControls.Butt on Button2;
protected System.Web.UI.W ebControls.Pane l Panel1;
private void Page_Load(objec t sender, System.EventArg s e)
{
if (Session["table"] != null)
Panel1.Controls .Add((Table) Session["table"]);
else
DisplayTable(tr ue,true);
}
I have no idea whether or not this is your problem, but if you put a
reference to the table into Session, and then add it the Controls collection
of the Panel, then table.Parent will point to the Panel control, and
Panel.Parent will point to (for example) the HtmlForm, and form.Parent will
point to the Page.
So, aren't you going to be keeping the entire page around in memory, at
least until the "Panel1.Control s.Add"?
And at that point, I wonder what happens when you take the table out of the
Controls collection of the previous request's Panel1 and put it into the
Panel1 of the current request? Many parts of a Controls lifecycle depend on
which Controls collection the control is in.
--
John Saunders
John.Saunders at SurfControl.com
The reason the table is in a session and put back into the panel controls on
page load is, that if you dont do that, the postback event will not fire at
all because the control is no longer on the page. So you have to put the
control back to allow the postback to fire, then do whatever else you want.
But I think you are right, it is probably a problem with the current
Response object.
"John Saunders" <john.saunder s at SurfControl.com > wrote in message
news:ew******** ******@tk2msftn gp13.phx.gbl... "George K" <a@bluefiretech nologies.com> wrote in message
news:ru******** ***********@war ds.force9.net.. . Hi, i have a very irriting problem that i have written a short piece of code to demonstrate. The problem is that my aspx page is not fully refreshed
after an event, which is delegated to an ImageButton during runtime, is
fired. Any suggestions would be great. This code is the c# behind a
webform with 1 panel and 2 buttons on it. I can see that the Page controls are
correct after the event, but the page does not display it this way.
protected System.Web.UI.W ebControls.Butt on Button1;
protected System.Web.UI.W ebControls.Butt on Button2;
protected System.Web.UI.W ebControls.Pane l Panel1;
private void Page_Load(objec t sender, System.EventArg s e)
{
if (Session["table"] != null)
Panel1.Controls .Add((Table) Session["table"]);
else
DisplayTable(tr ue,true);
}
I have no idea whether or not this is your problem, but if you put a
reference to the table into Session, and then add it the Controls
collection of the Panel, then table.Parent will point to the Panel control, and
Panel.Parent will point to (for example) the HtmlForm, and form.Parent
will point to the Page.
So, aren't you going to be keeping the entire page around in memory, at
least until the "Panel1.Control s.Add"?
And at that point, I wonder what happens when you take the table out of
the Controls collection of the previous request's Panel1 and put it into the
Panel1 of the current request? Many parts of a Controls lifecycle depend
on which Controls collection the control is in.
--
John Saunders
John.Saunders at SurfControl.com
"George K" <a@bluefiretech nologies.com> wrote in message
news:ek******** ***********@war ds.force9.net.. . The reason the table is in a session and put back into the panel controls
on page load is, that if you dont do that, the postback event will not fire
at all because the control is no longer on the page. So you have to put the
control back to allow the postback to fire, then do whatever else you
want.
The usual solution to this is to recreate the dynamic controls upon
postback. Unless the overhead of creating a specific control is high, I
would think it would be faster to create the controls each time than to keep
them around in Session state.
--
John Saunders
John.Saunders at SurfControl.com This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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after an event, which is delegated to an ImageButton during runtime, is
fired. Any suggestions would be great. This code is the c# behind a webform
with 1 panel and 2 buttons on it. I can see that the Page controls are
correct after the event, but the page does not display it this way.
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